enable fortran formatted reals

Author: whaeck

src/tools/disco/Real.hpp

@@ -54,7 +54,8 @@ class Real : public BaseFixedWidthField< Width > {
     // we are using fast_float::from_chars instead of std::from_chars since
     // not all standard c++ libraries implement the floating point version of
     // std::from_chars
-    auto result = fast_float::from_chars( &*iter, &*end, value );
+    fast_float::parse_options options{ fast_float::chars_format::fortran };
+    auto result = fast_float::from_chars_advanced( &*iter, &*end, value, options );
     if ( result.ec == std::errc() ) {
 
       auto advance = result.ptr - &*iter;